From 810ad7b62c0f075dc44ecc781b24c7f6ba388da5 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Fri, 17 Oct 2008 17:51:12 +0200 Subject: hwmon: (ams) Convert to a new-style i2c driver The legacy i2c binding model is phasing out, so the ams driver needs to be converted to a new-style i2c driver. Here is a naive approach of this conversion. Basically it is moving the i2c device creation from the ams driver to the i2c-powermac driver. This should work, but I suspect we could come up with something cleaner by declaring the i2c device as part of the platform setup. This could be done later by someone more familiar with openfirmware-based platforms than I am myself. One nice thing brought by this conversion is that the ams driver should be loaded automatically on systems where is is needed (at least when the I2C interface to the chip is used) providing coldplug-aware user-space environment. Signed-off-by: Jean Delvare Acked-by: Johannes Berg Cc: Stelian Pop Cc: Michael Hanselmann Cc: Benjamin Herrenschmidt --- drivers/i2c/busses/i2c-powermac.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'drivers/i2c') diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c index 0e7b1c6724a..60ca91745e5 100644 --- a/drivers/i2c/busses/i2c-powermac.c +++ b/drivers/i2c/busses/i2c-powermac.c @@ -259,6 +259,35 @@ static int __devinit i2c_powermac_probe(struct platform_device *dev) } printk(KERN_INFO "PowerMac i2c bus %s registered\n", name); + + if (!strncmp(basename, "uni-n", 5)) { + struct device_node *np; + const u32 *prop; + struct i2c_board_info info; + + /* Instantiate I2C motion sensor if present */ + np = of_find_node_by_name(NULL, "accelerometer"); + if (np && of_device_is_compatible(np, "AAPL,accelerometer_1") && + (prop = of_get_property(np, "reg", NULL))) { + int i2c_bus; + const char *tmp_bus; + + /* look for bus either using "reg" or by path */ + tmp_bus = strstr(np->full_name, "/i2c-bus@"); + if (tmp_bus) + i2c_bus = *(tmp_bus + 9) - '0'; + else + i2c_bus = ((*prop) >> 8) & 0x0f; + + if (pmac_i2c_get_channel(bus) == i2c_bus) { + memset(&info, 0, sizeof(struct i2c_board_info)); + info.addr = ((*prop) & 0xff) >> 1; + strlcpy(info.type, "ams", I2C_NAME_SIZE); + i2c_new_device(adapter, &info); + } + } + } + return rc; } -- cgit